Frequencies for first 10,000 rows of seat_pos variable in person dataset :

    Seating |
   Position |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        878        8.78        8.78
          1 |      5,315       53.15       61.93
          2 |        363        3.63       65.56
          3 |      1,744       17.44       83.00
          4 |        341        3.41       86.41
          5 |        161        1.61       88.02
          6 |        320        3.20       91.22
          7 |          4        0.04       91.26
          8 |          9        0.09       91.35
          9 |          6        0.06       91.41
         10 |         30        0.30       91.71
         13 |        190        1.90       93.61
         14 |         19        0.19       93.80
         15 |         40        0.40       94.20
         99 |        580        5.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016